JP2003020651A - Planting mat for slope construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planting mat for slope construction capable of preventing collapse of an artificial slope for its protection and promoting two-dimensional greening and growth of a three-dimensional tree form on the slope for recovery and preservation of a natural environment. SOLUTION: Biodegradable threads 2a with relatively high biodegradation speed and biodegradable threads 2b with relatively low biodegradation speed are crossed by each other for weaving a bag body 2 having a predetermined mesh size 2c. The inside of the bag body 2 is filled with a planting base material 3 necessary for two-dimensional greening and growth of the three- dimensional tree form on the slope.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vegetation mat for slope construction, and more particularly, to prevent collapse of an artificial slope such as a cut slope or an embankment to protect the slope and a flat surface of the slope. The present invention relates to a vegetation mat for slope construction that promotes natural greening and the growth of three-dimensional tree shapes, and can thereby restore and preserve the natural environment.

[0002]

BACKGROUND ART Artificial slopes such as cut slopes and embankments are subject to erosion and wind caused by infiltration of rainwater and groundwater,
It may collapse due to weathering due to temperature and cause a natural disaster. For this reason, various methods such as mortar spraying, stone masonry, concrete masonry, concrete framing, and rockfall prevention shelving have been used as slope protection to protect slopes. From the standpoint of environmental recovery and conservation, vegetation work has been requested, and various vegetation mats have been proposed as suitable materials.

However, in the conventionally proposed vegetation mat, the bag body for filling the vegetation base material is made by weaving the surface side woven fabric with biodegradable yarn such as polylactic acid fiber yarn, and the back side woven fabric with polyester. , Woven with synthetic fiber threads such as polyamide, polyethylene, or the entire bag body with synthetic fibers such as polyester, polyamide, polyethylene, etc., and the mesh of the front side woven cloth is the mesh of the back side woven cloth. Since it is woven more coarsely, and the surface side woven fabric is woven with biodegradable yarns such as polylactic acid fiber yarns at required intervals, seeds in the vegetation base material grow and slope. Even if it is possible to prevent the slope from collapsing by greening, the woven cloth made of synthetic fibers such as polyester cannot be returned to the soil after the greening, which significantly damages the landscape and damages the natural environment. Prevent the recovery of There is a problem that that.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above situation to eliminate the conventional problems, and its purpose is to have a relatively different biodegradation rate. A vegetation mat bag is woven with biodegradable yarns of various types, and a vegetation mat is formed by filling the bag body with a vegetation base material made of soil mixed with seeds of herbs and woody plants,
By laying this on a slope, when the biodegradable yarn with a fast biodegradation rate decomposes and returns to the soil, it is possible to plan planar greening by herbs and the biodegradable thread with a slow biodegradation rate. When vegetative mats are decomposed and returned to the soil, vegetation mats that can create the three-dimensional tree-shaped beauty of wood and thus contribute to the restoration and conservation of the natural environment in combination with the protection of slopes. The challenge is to provide.

[0005]

In order to solve the above problems, the first technical means adopted by the present invention is to press and inject a vegetation base material into a bag body woven by interlacing warp yarns and weft yarns. In the vegetation mat for slope construction, the bag body is woven by interlacing a biodegradable yarn having a relatively high biodegradation rate and a biodegradable yarn having a slow biodegradation rate at a predetermined mesh. The inside of the bag body is characterized in that vegetation equipment necessary for flat greening of the slope and growth of a three-dimensional tree shape is injected under pressure.

The second technical means adopted by the present invention is that the biodegradable yarn having a relatively high biodegradation rate is made of polylactic acid fiber yarn, and the biodegradable thread having a slow biodegradation rate is made of cotton, hemp or the like. It is characterized by being composed of vegetable fiber thread.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view of a bag body which is a constituent member of a vegetation mat, FIG. 2 is a perspective view of a vegetation mat partially shown in a vertical section, and FIG. 3 is a vegetation mat shown as a vertical section in a state of being laid on a slope. It is a side view.

In the above figure, the bag body 2 which is a constituent member of the vegetation mat 1 has a predetermined mesh 2 composed of a biodegradable thread 2a having a relatively high biodegradation rate and a biodegradable thread 2b having a relatively slow biodegradation rate.
It is woven by intersecting with c. In the examples, the biodegradable yarn 2a having a high biodegradation rate was used as the warp and the biodegradable yarn 2b having a slow biodegradation rate was used as the weft, but the present invention is not limited to this, and the biodegradation rate is not limited thereto. The fast biodegradable yarn may be used as the weft, and the biodegradable yarn 2b having a slow biodegradation rate may be used as the warp.

Polylactic acid fiber is suitable for the biodegradable yarn 2a having a high biodegradation rate, and the biodegradable yarn 2b having a slow biodegradation rate.
Is preferably a vegetable fiber thread such as cotton or hemp, but is not limited to this. The point is that the biodegradation rate is relatively different.
Any type of biodegradable thread may be used as long as the bag body 2 is woven.

The ground structure of the bag body 2 may be a plain weave, a twill weave, or a satin weave, but a plain weave is preferred because of the ease of the weaving process. Further, in the ground texture 2c, the rigidity of the vegetation mat 1 is improved by making it honey, but on the other hand, the growth of the plant is hindered, and conversely, when it is roughened, the rigidity is decreased.
About mm is preferable.

The bag body 2 is woven in a vertically long shape with a predetermined width. In the embodiment, it is set to have a width of 2 m, and is woven by dividing the lengthwise direction into 1 m intervals. The filling portion 2d is formed. Further, the bag body 2 is woven so that when the vegetation base material 3 described later is filled in the filling portion 2d, the entire thickness is 5 cm, 7 cm, 10 cm, 15 cm, 20 cm. . Further, the bag body 2 is colored in a color (brown-brown / brown-based) that is assimilated to the slope in order not to spoil the surrounding landscape after slope construction, but the coloring means is the biodegradable synthetic yarns 2a, 2b. May be dyed first, or the woven bag body 2 may be dyed.

The vegetation base material 3 is composed of soil, organic compost, wood chips, activated sludge, seeds of plants such as herbs and woody plants, which are kneaded with water at the slope construction site and pumped. The vegetation mat 1 is constructed by pressure injection into the bag body 2.

Next, a method of constructing a slope with the vegetation mat 1 constructed as described above will be described. First, vegetation mat 1
The required number of bag bodies 2 which are the constituent members are laid along the slope. Next, anchors 4 are driven on the ears in the longitudinal direction of the bag body 2 at appropriate intervals to connect and fix the bag body 2 in the longitudinal direction, and then the vegetation base material filling portions 2d ... In addition, the vegetation base material 3 is filled and the entire thickness of the bag body 2 is set to a predetermined thickness in accordance with the vegetation conditions at the site. At this time, the anchor 4 that fixes the bag body 2 along the slope is also formed by selecting a material that decomposes with time and returns to soil.

About 10 to 15 months after the construction, the seeds germinated and rooted, and the extended roots were densely entwined on the slope and entwined with the ground, so that the vegetation mat 1 was stably held, There is no fear that the vegetation base material 3 will flow out due to rain or snow. Then, after 2-3 years, the polylactic acid fiber yarn 2b, which has a relatively high biodegradation rate, is decomposed into water and carbon dioxide gas and returned to the soil. At that time, seeds of herbs are already growing. , The slope will be greened flat.

On the other hand, seeds of woody plants grow into seedlings, and the extended roots are entangled with the ground and are in a stable state.
After 4 to 5 years have passed since the construction, hemp thread, which has a relatively slow biodegradation rate, decomposes, and when it returns to the soil, it creates a three-dimensional tree-shaped beauty. Therefore, the vegetation mat 1 has no residue, and all is biodegraded and returned to the soil, so that the natural environment can be restored and preserved.

[0016]

As is apparent from the above description, according to the present invention, a bag body, which is a constituent member of a vegetation mat, is woven with two kinds of biodegradable threads having different biodegradation rates,
Corresponding to this, seeds of grasses and woods with different growth are mixed in the vegetation base material filled in the bag, so if this is laid on the slope, the biodegradation rate is high. When the biodegradable thread decomposes, seeds of fast-growing plants and trees can grow to green the slope flatly, and when the biodegradable thread with a slow biodegradation rate decomposes, the slow-growth occurs. It is not forgiving that the seeds of woody plants can grow and create a three-dimensional beauty of the tree, and the bag body of the vegetation mat is also decomposed and returned to the soil, so if you present a landscape, protect the slope. Can
It has the effect of recovering and preserving the natural environment.

[Brief description of drawings]

FIG. 1 is a plan view of a bag body that is a constituent member of a vegetation mat.

FIG. 2 is a perspective view of a vegetation mat showing a part in a longitudinal section.

FIG. 3 is a side view of a vegetation mat showing a longitudinal section of a state where it is laid on a slope.

[Explanation of symbols]

1 vegetation mat 2 bags 2a Biodegradable yarn (warp) with high biodegradation rate 2b Biodegradable yarn (weft) with slow biodegradation rate 2c eyes 3 Vegetation base material 4 anchor

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Claims (2)

[Claims] 1. A vegetation mat for slope construction in which a vegetation base material is pressure-injected into a bag body woven by interlacing warp threads and weft threads, wherein the bag body has a relatively high biodegradation rate. The biodegradable yarn and the biodegradable yarn having a slow biodegradation rate are woven by interlacing at a predetermined mesh, and the inside of the bag body is used for flat greening of the slope and growth of a three-dimensional tree shape. A vegetation mat for slope construction, in which necessary vegetation equipment is injected under pressure. 2. The biodegradable yarn having a relatively high biodegradation rate is made of polylactic acid fiber yarn, and the biodegradable yarn having a slow biodegradation rate is made of vegetable fiber yarn such as cotton and hemp. The vegetation mat for slope construction according to claim 1.